Enable fwupd refresh timer on Fedora 39

See: https://fedoraproject.org/wiki/Changes/EnableFwupdRefreshByDefault
Fixes: coreos/fedora-coreos-tracker#1512

manifests/enable-fwupd-refresh-timer.yaml

@@ -0,0 +1,2 @@
+ostree-layers:
+  - overlay/18fwupd-refresh-timer

manifests/fedora-coreos.yaml

@@ -46,6 +46,9 @@ conditional-include:
     # Modularity is going away in F39+ so we'll only include
     # the fedora-repos-modular package in <39.
     include: fedora-modularity.yaml
+  - if: releasever >= 39
+    # https://fedoraproject.org/wiki/Changes/EnableFwupdRefreshByDefault
+    include: enable-fwupd-refresh-timer.yaml
 
 ostree-layers:
   - overlay/15fcos

overlay.d/18fwupd-refresh-timer/statoverride

@@ -0,0 +1,2 @@
+# Config file for overriding permission bits on overlay files/dirs
+# Format: =<file mode in decimal> <absolute path to a file or directory>

overlay.d/18fwupd-refresh-timer/usr/lib/systemd/system-preset/50-fwupd-refresh-timer.preset

@@ -0,0 +1,2 @@
+# https://fedoraproject.org/wiki/Changes/EnableFwupdRefreshByDefault
+enable fwupd-refresh.timer

tests/kola/files/fwupd-refresh-timer

@@ -0,0 +1,22 @@
+#!/bin/bash
+## kola:
+##   exclusive: false
+##   description: Verify fwupd-refresh.timer is enabled.
+##   tags: "platform-independent"
+
+set -xeuo pipefail
+
+# shellcheck disable=SC1091
+. "$KOLA_EXT_DATA/commonlib.sh"
+
+if verlt "$(get_fedora_ver)" 39; then
+    ok "Skipping fwupd-refresh.timer test"
+fi
+
+# shellcheck disable=SC2043
+for unit in fwupd-refresh.timer; do
+    if ! systemctl is-enabled ${unit} 1>/dev/null; then
+        fatal "Unit ${unit} should be enabled"
+    fi
+    ok "Unit ${unit} is enabled as expected"
+done